SOLAF 2014

BIOLOGI SPM

MODUL 8

Diagram 1 shows the source of water pollution and the effect of this pollution on theriver in the formof graphs. Graphs I shows the changes in the population of bacteria in the river.Graph II shows the population of fish in the river.Rajah 1 menunjukkan sumber pencemaran air dan kesan pencemaran ini ke atassungai dalam bentuk graf. Graf I menunjukkan perubahan populasi bakteria dalamsungai. Graf II menunjukkan populasi ikan dalam sungai.

Rajah 1a

Name one type of pollutant discharged into the river.

Namakan satu bahan pencemar yang dibuang ke dalam sungai

[ 1 markah]

JPN PERAK

SOLAF 2014

b (i)

BIOLOGI SPM

MODUL 8

Describe the population of fish along zone X, Y and Z.

Huraikan keadaan populasi ikan di sepanjang zon X, Y, dan Z

Zone/Zon X:Zone/Zon Y:Zone/Zon Z:[ 3 Markah](ii)

Sketch a graph of the concentration of dissolved oxygen in the river.

Lakarkan satu graf kepekatan oksigen yang terlarut dalam sungai.

[ 1 Markah]c

State one method to reduce river pollution.

Nyatakan satu kaedah untuk mengurangkan pencemaran sungai.

[ 1 Markah]d (i)

State one process that may occur after the death of aquatic plants.Nyatakan satu proses yang mungkin berlaku selepas kematian tumbuhan akuatik.

What is the effect of this chemical factory on the river?

Apakah kesan kilang kimia ini ke atas sungai?

....[ 1 Markah](ii)

What is the effects of this chemical factory on the concentration of dissolved oxygenand the population of fishApakah kesan kilang kimia ini ke atas kepekatan oksigen yang terlarut dan populasiikan.......[ 2 Markah]

Diagram 2 shows a phenomenon in the atmosphere which take place in layer X.